semen

Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

n. A viscous whitish secretion of the male reproductive organs, containing spermatozoa and consisting of secretions of the testes, seminal vesicles, prostate, and bulbourethral glands. Also called seminal fluid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

n. A slimy, milky fluid produced in male reproductive organs that contains the reproductive cells.

from the GNU version of the Collaborative International Dictionary of English

n. The seed of plants.

n. The seed or fecundating fluid of male animals; sperm. It is a white or whitish viscid fluid secreted by the testes, characterized by the presence of spermatozoids to which it owes its generative power.

from The Century Dictionary and Cyclopedia

n. In botany, the seed of plants, or the matured ovule.

n. A thick whitish fluid of a peculiar odor, the combined product of the testes and accessory generative glands, containing spermatozoa as its essential constituent.

n. the thick white fluid containing spermatozoa that is ejaculated by the male genital tract

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English, from Latin sēmen, seed, semen.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin sēmen ("seed")

Examples

The term semen is, indeed, often applied to the secretion of the testicles alone; but to avoid misunderstanding, Fürbringer [8] recommends that only the mixed secretion, as actually discharged, should be spoken of as the semen, and that this term should never be employed to denote the testicular secretion alone.

This being one of the founding documents of what I refer to as "Blood, Sweat and Tears Humanism", any three of those bodily fluids would be acceptable, though for this particular document obviously semen is preferred (for men).